The game task structure in constructing educational toys has a very important influence on the realization of learning efficacy. According to the structure type analysis of the game task in constructing educational toys, it is helpful to clarify the layout rules of game tasks and provide important reference for designing the constructing educational toys with good learning ideas. This paper focuses on the current mainstream learning theories and relationship between the game task structure in constructing educational toys and learning tools to analyze the main structural types of the game tasks in constructing educational toys one by one. Based on relevant learning theories, for game tasks of manifold constructing educational toys, their internal structures can be classified into four types:"single-line game task structure", "multi-line unified game task structure", "multi-line divergent game task structure" and "constructive game task structure", and they are applicable to different game-based learning objectives, meanwhile, their value can be embodied in such three design dimensions as "shape", "connection" and "function".